Ink cartridge



FIG. 1 is a perspective view of an ink cartridge, as viewed from the top front and left side, embodying my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view thereof, as viewed from the bottom rear and right side. 

The ornamental design for an ink cartridge, as shown and described. 